Prediction of direct and indirect genetic gains and genotypic correlations in rubber tree progenies

Authors

  • Cecília Khusala Verardi Instituto Agronômico de Campinas (IAC)
  • Erivaldo José Scaloppi Junior Agência Paulista de Tecnologia dos Agronegócios
  • Paulo de Souza Gonçalves Instituto Agronômico de Campinas

DOI:

https://doi.org/10.1590/S1678-3921.pab2011.v46.11007

Keywords:

Hevea brasiliensis, direct and indirect method, early selection, selection cycle

Abstract

The objective of this work was to estimate the genetic parameters, genotypic and phenotypic correlations, and direct and indirect genetic gains among and within rubber tree (Hevea brasiliensis) progenies. The experiment was set up at the Municipality of Jaú, SP, Brazil. A randomized complete block design was used, with 22 treatments (progenies), 6 replicates, and 10 plants per plot at a spacing of 3x3 m. Three-year-old progenies were assessed for girth, rubber yield, and bark thickness by direct and indirect gains and genotypic correlations. The number of latex vessel rings showed the best correlations, correlating positively and significantly with girth and bark thickness. Selection gains among progenies were greater than within progeny for all the variables analyzed. Total gains obtained were high, especially for girth increase and rubber yield, which were 93.38 and 105.95%, respectively. Young progeny selection can maximize the expected genetic gains, reducing the rubber tree selection cycle.

Author Biographies

Cecília Khusala Verardi, Instituto Agronômico de Campinas (IAC)

http://lattes.cnpq.br/0977982918532121

Erivaldo José Scaloppi Junior, Agência Paulista de Tecnologia dos Agronegócios

http://lattes.cnpq.br/4934673492086980

Paulo de Souza Gonçalves, Instituto Agronômico de Campinas

http://lattes.cnpq.br/7998615537688819

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Published

2011-12-13

How to Cite

Verardi, C. K., Scaloppi Junior, E. J., & Gonçalves, P. de S. (2011). Prediction of direct and indirect genetic gains and genotypic correlations in rubber tree progenies. Pesquisa Agropecuaria Brasileira, 46(9), 1076–1081. https://doi.org/10.1590/S1678-3921.pab2011.v46.11007

Issue

Section

GENETICS